feat(flatpak): automatically remove flatpak's not declared

hosts/skadi/configuration.nix

@@ -95,7 +95,15 @@
   services.flatpak = {
     enable = true;
     packages = [
+      "com.dec05eba.gpu_screen_recorder"
     ];
+
+    uninstallUnmanaged = true;
+
+    update.auto = {
+      enable = true;
+      onCalendar = "weekly";
+    };
   };
 
   # Enable coolercontrol to setup fancurves

modules/linux/home-manager/desktop.nix

@@ -17,6 +17,7 @@
       feather
       gparted
       cameractrls-gtk4
+      delfin
     ];
 
     # Install keepassxc

modules/linux/home-manager/flatpak.nix

@@ -11,16 +11,14 @@
     services.flatpak = {
       enable = true;
       packages = [
-        "com.usebottles.bottles"
         "com.github.tchx84.Flatseal"
-        "cafe.avery.Delfin"
-        "com.valvesoftware.Steam.Utility.MangoHud"
       ];
 
       update.auto = {
         enable = true;
         onCalendar = "weekly";
       };
+      uninstallUnmanaged = true;
     };
   };
 }